Speed Maths Test Worksheet

Speed calculation lesson 15: Mixed speed challenge · Set 834 · 40 questions

The fast method (Spot the trick): A 7, 8 or 9 in the ones place → round and fix. × 4, 8, 5, 50 or 15 → doubling or halving tricks. ÷ 5, 25 or 50 → double first. A percentage → start from 10%. Checking or estimating → nines or rounding.

1. 1.25% of 140 =
2. 2.14 × 50 =
3. 3.Check with nines: 46 × 87 = 4002. Correct or wrong? (a) correct (b) wrong
4. 4.21² =
5. 5.144 − 28 =
6. 6.41² =
7. 7.Best estimate of 51 × 38? (a) 200 (b) 4000 (c) 20000 (d) 2000
8. 8.Check with nines: 19 × 40 = 760. Correct or wrong? (a) correct (b) wrong
9. 9.103 × 4 =
10. 10.19 × 15 =
11. 11.Check with nines: 379 + 234 = 609. Correct or wrong? (a) wrong (b) correct
12. 12.84 + 53 + 12 + 30 =
13. 13.54 + 23 + 28 + 52 =
14. 14.56 + 70 + 14 + 39 =
15. 15.8 + 3 + 1 + 5 + 2 =
16. 16.54 + 74 + 31 + 22 =
17. 17.321 − 16 =
18. 18.10% of 30 =
19. 19.21 + 61 + 25 + 32 =
20. 20.93 × 5 =
21. 21.Check with nines: 63 × 24 = 1509. Correct or wrong? (a) correct (b) wrong
22. 22.25 × 15 =
23. 23.180 + 97 =
24. 24.170 + 67 =
25. 25.49 × 50 =
26. 26.15% of 710 =
27. 27.465 − 59 =
28. 28.212 + 88 =
29. 29.55 + 41 + 89 + 77 =
30. 30.₹86.30 − ₹40.10 =
31. 31.33 + 56 + 26 + 82 =
32. 32.43 × 15 =
33. 33.1 + 8 + 4 + 4 + 9 =
34. 34.Best estimate of 401 × 7? (a) 28000 (b) 5600 (c) 280 (d) 2800
35. 35.Best estimate of 303 × 7? (a) 2100 (b) 4200 (c) 21000 (d) 210
36. 36.89 + 89 + 87 + 59 =
37. 37.₹25.95 + ₹43.70 =
38. 38.1175 ÷ 25 =
39. 39.40 × 5 =
40. 40.394 + 77 =

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